MAX338EEE+ - 8:1 Low-Leakage CMOS Multiplexer | Maxim Integrated
料号： MAX338EEE+ ✓ 量产中MAX338EEE+ 概述
An analog multiplexer is a semiconductor switching network that routes one selected input to a shared output. The MAX338 belongs to the CMOS analog switch and multiplexer hierarchy, where low leakage is valuable when measuring weak, high-impedance signals or when unused channels must contribute little error to the measurement system. It also supports positive-only and split-supply analog systems, allowing the same switching architecture to serve instrumentation, test, measurement, and signal-routing equipment.
Verified product information identifies one analog switch circuit, an 8:1 configuration, 400 ohm on-resistance, a 16-QSOP package, and low-leakage CMOS construction. The single-supply operating range is +4.5 V to +30 V, while dual-supply operation extends from ±4.5 V to ±20 V. These wide ranges permit use with legacy ±15 V analog circuits as well as modern single-rail systems. The EEE ordering code is associated with the industrial-grade 16-terminal surface-mount variant shown in distributor data.
Because the MAX338 is a monolithic CMOS multiplexer, its internal channels share one common output. This architecture minimizes the number of external signal paths in a multi-source measurement design, although it does not provide simultaneous access to all eight channels. Selection should therefore be based on required channel count, acceptable on-resistance, leakage limit, supply topology, and the voltage and current levels present at each switched node. Detailed leakage, bandwidth, charge-injection, and switching-time figures were not supplied in the verified excerpts and must be taken from the manufacturer datasheet.
Typical uses include automated test equipment, data-acquisition systems, sensor-signaling interfaces, process-control instrumentation, and laboratory measurement front ends. The device is particularly useful when many potential analog inputs must share one amplifier, converter, or data-acquisition channel. A suitable external circuit must also keep every input and output within the device's absolute maximum ratings during switching and fault conditions.
Designers should verify control logic levels, input overvoltage tolerance, analog signal range, and break-before-make behavior against the full datasheet before layout release. Care should be taken around unused channels, signal-source impedance, and injected charge because low leakage alone does not guarantee low measurement error. Input filtering may be appropriate when fast transients or high-energy events are possible.
This product record combines verified manufacturer and distributor information, explicit data-gap markers, same-family drop-in candidates, and practical selection guidance. It is intended to help engineers identify the correct 16-QSOP multiplexer while separating confirmed MAX338EEE+ attributes from parameters that still require direct datasheet verification.
直接替换替代料： MAX338EEE+ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MAX338EEE+ （相同外形与封装尺寸） ——差异在于 Mounting Type, Number of Channels, Package.
MAX337CPE+
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX328CPE+
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX329CPE+
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX339CPE+
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX338EPE+
✅ 直接替换联系询价
查看数据手册 →MAX338EEE+ 规格参数
| Multiplexer Configuration | 8:1 single-ended |
| Number of Switch Circuits | 1 circuit |
| Number of Channels | 8 channels |
| On-Resistance | 400 ohm |
| Switch Technology | CMOS |
| Single-Supply Operating Voltage | +4.5 V to +30 V |
| Dual-Supply Operating Voltage | ±4.5 V to ±20 V |
| 封装 | 16-QSOP |
| Terminal Count | 16 terminals |
| 安装类型 | Surface mount |
| Package Shape | Rectangular |
| Temperature Grade | Industrial |
| Product Family | MAX338/MAX339 8-channel/dual 4-channel low-leakage CMOS analog multiplexer family |
MAX338EEE+ rectangular 引脚配置指南
MAX338EEE+（rectangular 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： MAX338EEE+.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MAX338EEE+ 适用于 6 应用s: Automated Test Equipment, Data Acquisition Systems, Industrial Sensor Multiplexing, Laboratory Signal Routing, Process Control Interfaces, Battery-Powered Portable Instruments.
Automated Test Equipment
The MAX338EEE+ fits automated test systems that route several analog test points to one shared measurement channel. Its 8:1 architecture reduces external routing hardware, while the verified 400 ohm on-resistance is suitable when the selected source has relatively low impedance and the downstream instrument provides suitable input loading. The device can operate from +4.5 V to +30 V or from ±4.5 V to ±20 V, allowing integration with legacy ±15 V fixtures. Before release, verify leakage, charge injection, switching time, control levels, and maximum signal excursion against the complete manufacturer datasheet.
推荐
Data Acquisition Systems
MAX338EEE+ allows a data-acquisition board to select among eight analog inputs without duplicating the amplifier, converter, or front-end circuitry. The single-ended 8:1 arrangement is appropriate for multiplexed pressure, temperature, or process-control signals whose source impedance keeps the 400 ohm on-resistance from dominating the measurement. Its wide supply range supports both modern single-rail electronics and split-supply instrumentation. Guard against channel-selection transients by checking the datasheet for charge injection, leakage, and bandwidth before selecting input impedance and sampling rate.
推荐
Industrial Sensor Multiplexing
The MAX338EEE+ is applicable when multiple industrial sensor outputs must be presented to a common controller input. Its 8:1 configuration supports a compact sensor interface, while operation from +4.5 V to +30 V is useful in industrial control cabinets using a 24 V nominal supply. The industrial-grade ordering variant aligns with equipment operating outside consumer-only temperature conditions, although the exact temperature limits remain unverified here. Confirm signal amplitude, common-mode range, isolation needs, leakage, and fault-state behavior before deploying it with high-impedance sensors.
推荐
Laboratory Signal Routing
MAX338EEE+ can route one of eight laboratory analog sources into a common oscilloscope, DMM, or amplifier input. The 8:1 channel count is valuable when an instrument has limited analog inputs, and the 400 ohm on-resistance should be checked against the source impedance and expected bandwidth. Both +4.5 V to +30 V single-supply and ±4.5 V to ±20 V dual-supply operation provide flexibility across laboratory instruments. For precision measurements, review leakage and charge-injection specifications and account for settling time after each selection change.
推荐
Process Control Interfaces
The MAX338EEE+ can consolidate pressure, flow, level, or valve-feedback analog signals onto a single controller or data-conversion channel. Its 8:1 topology reduces analog fanout while the broad supply range permits use in 24 V-based industrial systems. The low-leakage CMOS design is potentially beneficial when sources have high output impedance, but engineers must confirm leakage, on-resistance accuracy, and switching transients from the full data sheet. Fail-safe behavior also matters because an unintended switched path could connect an external process signal to instrumentation circuitry.
推荐
Battery-Powered Portable Instruments
MAX338EEE+ can reduce analog front-end complexity in portable measurement instruments by selecting among multiple sensor inputs with one multiplexer. Although its verified supply range includes low-voltage single-rail operation, the +4.5 V minimum prevents direct operation from a single Li-ion cell below 4.5 V. A boost or buck-boost rail may therefore be required, adding conversion noise and efficiency considerations that can offset the multiplexer's low-leakage benefits. Validate shutdown current, signal loading, leakage, and settling behavior before choosing it for low-power designs.
推荐
推荐产品汇总
工程参考数据： MAX338EEE+ ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MAX337CPE+ | MAX328CPE+ | MAX329CPE+ | MAX339CPE+ | MAX338EPE+ |
|---|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | 16-QSOP | 16-QSOP | 16-QSOP | 16-QSOP | 16-QSOP | 16-QSOP |
| Switch Technology | Low-leakage CMOS | CMOS | Low-leakage CMOS with lower leakage than MAX338 | CMOS | Low-leakage CMOS | Low-leakage CMOS |
关键差异点
- Single 8:1 architecture in a 16-QSOP package （对比 MAX339CPE+)
- Lower on-resistance than the explicitly identified MAX328 alternative （对比 MAX328CPE+)
- Wide single- and dual-supply operating range （对比 MAX338EPE+)
设计说明
Confirm source impedance, acquisition bandwidth, charge injection, and settling time before fixing the input network. The verified 400 ohm on-resistance can be acceptable for low-impedance sources, but it may form a significant divider with a high-impedance sensor or sample-and-hold input. Verify the complete manufacturer data sheet for leakage and injection limits because those values were not present in the supplied excerpts.
Route analog inputs and the common output as short traces away from digital select and clock lines, and place the common output close to the destination amplifier or converter when practical. Keep unused-channel connections defined according to the datasheet rather than allowing them to float if leakage is significant. Use a solid ground reference and avoid placing the analog trace beneath switching-regulator or digital-logic routing.
The verified supply range of +4.5 V to +30 V or ±4.5 V to ±20 V provides flexibility, but the multiplexer does not remove the need for stable analog rails. Bypass the supply pins according to the manufacturer recommendations, account for control-logic levels referenced to the applicable supply, and ensure every selected analog node remains within the absolute maximum ratings during startup and fault conditions.
Do not treat the MAX338 as a simultaneous eight-channel sampler; only one input connects to the common output at a time. Also, the manufacturer statement that MAX338 and MAX339 are upgrades for DG508A and DG509A does not establish a reverse drop-in relationship. Confirm channel mapping, address logic, break-before-make behavior, and pin names for any substitution against the manufacturer pin table.
合规信息
The supplied verified excerpts do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Obtain the current manufacturer compliance declarations before production release.
